1. ISO 5725-1994, “Accuracy (Trueness and Precision) of Measurement Methods and Results”.
2. ISO/IEC 17025:2005, “General Requirements for the Competence of Testing and Calibration Laboratories”.
3. ISO 15189:2007, “Medical laboratories—Particular Requirements for Quality and Competence”.
4. EURACHEM, “Selection, Use and Interpretation of Proficiency Testing (PT) Schemes,” 2nd Edition, 2011.
5. IAEA/AFRA Project RAF /4/022, Summary Report-Nuclear Sciences and Applications, 31 March 2013.